Cleanup: Remove bNodeType flag from base registration functions

This flag is only used a few small cases, so instead
of setting the flag for every node only set the
required flag for the nodes that require it.

Mostly the flag is used to set `ntype.flag = NODE_PREVIEW`
For nodes that should have previews by default which
is only some compositor nodes and some texture nodes.

The frame node also sets the `NODE_BACKGROUND` flag.

All other nodes were setting a flag of 0 which has no purpose.

Reviewed By: JacquesLucke

Differential Revision: https://developer.blender.org/D13699

25 files changed, 35 insertions, 30 deletions

diff --git a/source/blender/nodes/texture/node_texture_util.c b/source/blender/nodes/texture/node_texture_util.c
index 1ba693bf4a4..dc5e2bfcd6b 100644
--- a/source/blender/nodes/texture/node_texture_util.c
+++ b/source/blender/nodes/texture/node_texture_util.c
@@ -50,10 +50,9 @@ bool tex_node_poll_default(bNodeType *UNUSED(ntype),
   return true;
 }
 
-void tex_node_type_base(
-    struct bNodeType *ntype, int type, const char *name, short nclass, short flag)
+void tex_node_type_base(struct bNodeType *ntype, int type, const char *name, short nclass)
 {
-  node_type_base(ntype, type, name, nclass, flag);
+  node_type_base(ntype, type, name, nclass);
 
   ntype->poll = tex_node_poll_default;
   ntype->insert_link = node_insert_link_default;
diff --git a/source/blender/nodes/texture/node_texture_util.h b/source/blender/nodes/texture/node_texture_util.h
index 473cef81359..d53000058a3 100644
--- a/source/blender/nodes/texture/node_texture_util.h
+++ b/source/blender/nodes/texture/node_texture_util.h
@@ -108,8 +108,7 @@ typedef struct TexDelegate {
 bool tex_node_poll_default(struct bNodeType *ntype,
                            struct bNodeTree *ntree,
                            const char **r_disabled_hint);
-void tex_node_type_base(
-    struct bNodeType *ntype, int type, const char *name, short nclass, short flag);
+void tex_node_type_base(struct bNodeType *ntype, int type, const char *name, short nclass);
 
 void tex_input_rgba(float *out, bNodeStack *in, TexParams *params, short thread);
 void tex_input_vec(float *out, bNodeStack *in, TexParams *params, short thread);
diff --git a/source/blender/nodes/texture/nodes/node_texture_at.c b/source/blender/nodes/texture/nodes/node_texture_at.c
index a6f8d28db75..41dea303ea2 100644
--- a/source/blender/nodes/texture/nodes/node_texture_at.c
+++ b/source/blender/nodes/texture/nodes/node_texture_at.c
@@ -58,7 +58,7 @@ void register_node_type_tex_at(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_AT, "At", NODE_CLASS_DISTORT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_AT, "At", NODE_CLASS_DISTORT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_size(&ntype, 140, 100, 320);
   node_type_exec(&ntype, NULL, NULL, exec);
diff --git a/source/blender/nodes/texture/nodes/node_texture_bricks.c b/source/blender/nodes/texture/nodes/node_texture_bricks.c
index 72690d6ccfe..0dc92dc33d0 100644
--- a/source/blender/nodes/texture/nodes/node_texture_bricks.c
+++ b/source/blender/nodes/texture/nodes/node_texture_bricks.c
@@ -119,11 +119,12 @@ void register_node_type_tex_bricks(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_BRICKS, "Bricks", NODE_CLASS_PATTERN, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_BRICKS, "Bricks", NODE_CLASS_PATTERN);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
   node_type_init(&ntype, init);
   node_type_exec(&ntype, NULL, NULL, exec);
+  ntype.flag |= NODE_PREVIEW;
 
   nodeRegisterType(&ntype);
 }
diff --git a/source/blender/nodes/texture/nodes/node_texture_checker.c b/source/blender/nodes/texture/nodes/node_texture_checker.c
index e3c4d44e7f5..62657cd7def 100644
--- a/source/blender/nodes/texture/nodes/node_texture_checker.c
+++ b/source/blender/nodes/texture/nodes/node_texture_checker.c
@@ -70,9 +70,10 @@ void register_node_type_tex_checker(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_CHECKER, "Checker", NODE_CLASS_PATTERN, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_CHECKER, "Checker", NODE_CLASS_PATTERN);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
+  ntype.flag |= NODE_PREVIEW;
 
   nodeRegisterType(&ntype);
 }
diff --git a/source/blender/nodes/texture/nodes/node_texture_common.c b/source/blender/nodes/texture/nodes/node_texture_common.c
index f873ed5e457..b01353bcd21 100644
--- a/source/blender/nodes/texture/nodes/node_texture_common.c
+++ b/source/blender/nodes/texture/nodes/node_texture_common.c
@@ -161,7 +161,7 @@ void register_node_type_tex_group(void)
   /* NOTE: Cannot use #sh_node_type_base for node group, because it would map the node type
    * to the shared #NODE_GROUP integer type id. */
 
-  node_type_base_custom(&ntype, "TextureNodeGroup", "Group", NODE_CLASS_GROUP, 0);
+  node_type_base_custom(&ntype, "TextureNodeGroup", "Group", NODE_CLASS_GROUP);
   ntype.type = NODE_GROUP;
   ntype.poll = tex_node_poll_default;
   ntype.poll_instance = node_group_poll_instance;
diff --git a/source/blender/nodes/texture/nodes/node_texture_compose.c b/source/blender/nodes/texture/nodes/node_texture_compose.c
index ffa0e9ae43e..cd918ca8314 100644
--- a/source/blender/nodes/texture/nodes/node_texture_compose.c
+++ b/source/blender/nodes/texture/nodes/node_texture_compose.c
@@ -58,7 +58,7 @@ void register_node_type_tex_compose(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_COMPOSE, "Combine RGBA", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_COMPOSE, "Combine RGBA", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_coord.c b/source/blender/nodes/texture/nodes/node_texture_coord.c
index d3cad460099..e31fdcafbf2 100644
--- a/source/blender/nodes/texture/nodes/node_texture_coord.c
+++ b/source/blender/nodes/texture/nodes/node_texture_coord.c
@@ -49,7 +49,7 @@ void register_node_type_tex_coord(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_COORD, "Coordinates", NODE_CLASS_INPUT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_COORD, "Coordinates", NODE_CLASS_INPUT);
   node_type_socket_templates(&ntype, NULL, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_curves.c b/source/blender/nodes/texture/nodes/node_texture_curves.c
index f61e3f36db5..7fed45c5558 100644
--- a/source/blender/nodes/texture/nodes/node_texture_curves.c
+++ b/source/blender/nodes/texture/nodes/node_texture_curves.c
@@ -65,7 +65,7 @@ void register_node_type_tex_curve_time(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_CURVE_TIME, "Time", NODE_CLASS_INPUT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_CURVE_TIME, "Time", NODE_CLASS_INPUT);
   node_type_socket_templates(&ntype, NULL, time_outputs);
   node_type_size_preset(&ntype, NODE_SIZE_LARGE);
   node_type_init(&ntype, time_init);
@@ -114,7 +114,7 @@ void register_node_type_tex_curve_rgb(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_CURVE_RGB, "RGB Curves", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_CURVE_RGB, "RGB Curves", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, rgb_inputs, rgb_outputs);
   node_type_size_preset(&ntype, NODE_SIZE_LARGE);
   node_type_init(&ntype, rgb_init);
diff --git a/source/blender/nodes/texture/nodes/node_texture_decompose.c b/source/blender/nodes/texture/nodes/node_texture_decompose.c
index 83922ea03ab..9c3cb6911e1 100644
--- a/source/blender/nodes/texture/nodes/node_texture_decompose.c
+++ b/source/blender/nodes/texture/nodes/node_texture_decompose.c
@@ -78,7 +78,7 @@ void register_node_type_tex_decompose(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_DECOMPOSE, "Separate RGBA", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_DECOMPOSE, "Separate RGBA", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_distance.c b/source/blender/nodes/texture/nodes/node_texture_distance.c
index 88f3da94706..2f8b28722bd 100644
--- a/source/blender/nodes/texture/nodes/node_texture_distance.c
+++ b/source/blender/nodes/texture/nodes/node_texture_distance.c
@@ -60,7 +60,7 @@ void register_node_type_tex_distance(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_DISTANCE, "Distance", NODE_CLASS_CONVERTER, 0);
+  tex_node_type_base(&ntype, TEX_NODE_DISTANCE, "Distance", NODE_CLASS_CONVERTER);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_hueSatVal.c b/source/blender/nodes/texture/nodes/node_texture_hueSatVal.c
index 759fb3d43d5..f405c3b0bec 100644
--- a/source/blender/nodes/texture/nodes/node_texture_hueSatVal.c
+++ b/source/blender/nodes/texture/nodes/node_texture_hueSatVal.c
@@ -107,7 +107,7 @@ void register_node_type_tex_hue_sat(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_HUE_SAT, "Hue Saturation Value", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_HUE_SAT, "Hue Saturation Value", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
   node_type_exec(&ntype, NULL, NULL, exec);
diff --git a/source/blender/nodes/texture/nodes/node_texture_image.c b/source/blender/nodes/texture/nodes/node_texture_image.c
index 9c61405ea23..18ae3609407 100644
--- a/source/blender/nodes/texture/nodes/node_texture_image.c
+++ b/source/blender/nodes/texture/nodes/node_texture_image.c
@@ -108,12 +108,13 @@ void register_node_type_tex_image(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_IMAGE, "Image", NODE_CLASS_INPUT, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_IMAGE, "Image", NODE_CLASS_INPUT);
   node_type_socket_templates(&ntype, NULL, outputs);
   node_type_init(&ntype, init);
   node_type_storage(&ntype, "ImageUser", node_free_standard_storage, node_copy_standard_storage);
   node_type_exec(&ntype, NULL, NULL, exec);
   ntype.labelfunc = node_image_label;
+  ntype.flag |= NODE_PREVIEW;
 
   nodeRegisterType(&ntype);
 }
diff --git a/source/blender/nodes/texture/nodes/node_texture_invert.c b/source/blender/nodes/texture/nodes/node_texture_invert.c
index 5d3f86c5c9c..7854ac4b5b8 100644
--- a/source/blender/nodes/texture/nodes/node_texture_invert.c
+++ b/source/blender/nodes/texture/nodes/node_texture_invert.c
@@ -63,7 +63,7 @@ void register_node_type_tex_invert(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_INVERT, "Invert", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_INVERT, "Invert", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_math.c b/source/blender/nodes/texture/nodes/node_texture_math.c
index 4cbe524a96b..2f50f6aaae0 100644
--- a/source/blender/nodes/texture/nodes/node_texture_math.c
+++ b/source/blender/nodes/texture/nodes/node_texture_math.c
@@ -335,7 +335,7 @@ void register_node_type_tex_math(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_MATH, "Math", NODE_CLASS_CONVERTER, 0);
+  tex_node_type_base(&ntype, TEX_NODE_MATH, "Math", NODE_CLASS_CONVERTER);
   node_type_socket_templates(&ntype, inputs, outputs);
   ntype.labelfunc = node_math_label;
   node_type_exec(&ntype, NULL, NULL, exec);
diff --git a/source/blender/nodes/texture/nodes/node_texture_mixRgb.c b/source/blender/nodes/texture/nodes/node_texture_mixRgb.c
index 044875cce90..5599807d8b1 100644
--- a/source/blender/nodes/texture/nodes/node_texture_mixRgb.c
+++ b/source/blender/nodes/texture/nodes/node_texture_mixRgb.c
@@ -69,7 +69,7 @@ void register_node_type_tex_mix_rgb(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_MIX_RGB, "Mix", NODE_CLASS_OP_COLOR, 0);
+  tex_node_type_base(&ntype, TEX_NODE_MIX_RGB, "Mix", NODE_CLASS_OP_COLOR);
   node_type_socket_templates(&ntype, inputs, outputs);
   ntype.labelfunc = node_blend_label;
   node_type_exec(&ntype, NULL, NULL, exec);
diff --git a/source/blender/nodes/texture/nodes/node_texture_output.c b/source/blender/nodes/texture/nodes/node_texture_output.c
index 50f41239581..4911ab7ba9e 100644
--- a/source/blender/nodes/texture/nodes/node_texture_output.c
+++ b/source/blender/nodes/texture/nodes/node_texture_output.c
@@ -166,13 +166,14 @@ void register_node_type_tex_output(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_OUTPUT, "Output", NODE_CLASS_OUTPUT, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_OUTPUT, "Output", NODE_CLASS_OUTPUT);
   node_type_socket_templates(&ntype, inputs, NULL);
   node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
   node_type_init(&ntype, init);
   node_type_storage(&ntype, "TexNodeOutput", node_free_standard_storage, copy);
   node_type_exec(&ntype, NULL, NULL, exec);
 
+  ntype.flag |= NODE_PREVIEW;
   ntype.no_muting = true;
 
   nodeRegisterType(&ntype);
diff --git a/source/blender/nodes/texture/nodes/node_texture_proc.c b/source/blender/nodes/texture/nodes/node_texture_proc.c
index a8a82153e58..8c294b5954d 100644
--- a/source/blender/nodes/texture/nodes/node_texture_proc.c
+++ b/source/blender/nodes/texture/nodes/node_texture_proc.c
@@ -294,12 +294,13 @@ static void init(bNodeTree *UNUSED(ntree), bNode *node)
   { \
     static bNodeType ntype; \
 \
-    tex_node_type_base(&ntype, TEX_NODE_PROC + TEXTYPE, Name, NODE_CLASS_TEXTURE, NODE_PREVIEW); \
+    tex_node_type_base(&ntype, TEX_NODE_PROC + TEXTYPE, Name, NODE_CLASS_TEXTURE); \
     node_type_socket_templates(&ntype, name##_inputs, outputs); \
     node_type_size_preset(&ntype, NODE_SIZE_MIDDLE); \
     node_type_init(&ntype, init); \
     node_type_storage(&ntype, "Tex", node_free_standard_storage, node_copy_standard_storage); \
     node_type_exec(&ntype, NULL, NULL, name##_exec); \
+    ntype.flag |= NODE_PREVIEW; \
 \
     nodeRegisterType(&ntype); \
   }
diff --git a/source/blender/nodes/texture/nodes/node_texture_rotate.c b/source/blender/nodes/texture/nodes/node_texture_rotate.c
index 9985499772e..18024a4d41d 100644
--- a/source/blender/nodes/texture/nodes/node_texture_rotate.c
+++ b/source/blender/nodes/texture/nodes/node_texture_rotate.c
@@ -95,7 +95,7 @@ void register_node_type_tex_rotate(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_scale.c b/source/blender/nodes/texture/nodes/node_texture_scale.c
index d23b1b4d037..d570c73a67b 100644
--- a/source/blender/nodes/texture/nodes/node_texture_scale.c
+++ b/source/blender/nodes/texture/nodes/node_texture_scale.c
@@ -68,7 +68,7 @@ void register_node_type_tex_scale(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_SCALE, "Scale", NODE_CLASS_DISTORT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_SCALE, "Scale", NODE_CLASS_DISTORT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_texture.c b/source/blender/nodes/texture/nodes/node_texture_texture.c
index 59e2e9be581..083ae67ccb6 100644
--- a/source/blender/nodes/texture/nodes/node_texture_texture.c
+++ b/source/blender/nodes/texture/nodes/node_texture_texture.c
@@ -94,9 +94,10 @@ void register_node_type_tex_texture(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_TEXTURE, "Texture", NODE_CLASS_INPUT, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_TEXTURE, "Texture", NODE_CLASS_INPUT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
+  ntype.flag |= NODE_PREVIEW;
 
   nodeRegisterType(&ntype);
 }
diff --git a/source/blender/nodes/texture/nodes/node_texture_translate.c b/source/blender/nodes/texture/nodes/node_texture_translate.c
index 2eef3132a18..732cd0a89a1 100644
--- a/source/blender/nodes/texture/nodes/node_texture_translate.c
+++ b/source/blender/nodes/texture/nodes/node_texture_translate.c
@@ -64,7 +64,7 @@ void register_node_type_tex_translate(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_TRANSLATE, "Translate", NODE_CLASS_DISTORT, 0);
+  tex_node_type_base(&ntype, TEX_NODE_TRANSLATE, "Translate", NODE_CLASS_DISTORT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_valToNor.c b/source/blender/nodes/texture/nodes/node_texture_valToNor.c
index 5ccd44b8bf0..3f0d4fb668e 100644
--- a/source/blender/nodes/texture/nodes/node_texture_valToNor.c
+++ b/source/blender/nodes/texture/nodes/node_texture_valToNor.c
@@ -80,7 +80,7 @@ void register_node_type_tex_valtonor(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_VALTONOR, "Value to Normal", NODE_CLASS_CONVERTER, 0);
+  tex_node_type_base(&ntype, TEX_NODE_VALTONOR, "Value to Normal", NODE_CLASS_CONVERTER);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_valToRgb.c b/source/blender/nodes/texture/nodes/node_texture_valToRgb.c
index 2446ef05e0c..844a4188663 100644
--- a/source/blender/nodes/texture/nodes/node_texture_valToRgb.c
+++ b/source/blender/nodes/texture/nodes/node_texture_valToRgb.c
@@ -63,7 +63,7 @@ void register_node_type_tex_valtorgb(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_VALTORGB, "ColorRamp", NODE_CLASS_CONVERTER, 0);
+  tex_node_type_base(&ntype, TEX_NODE_VALTORGB, "ColorRamp", NODE_CLASS_CONVERTER);
   node_type_socket_templates(&ntype, valtorgb_in, valtorgb_out);
   node_type_size_preset(&ntype, NODE_SIZE_LARGE);
   node_type_init(&ntype, valtorgb_init);
@@ -105,7 +105,7 @@ void register_node_type_tex_rgbtobw(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_RGBTOBW, "RGB to BW", NODE_CLASS_CONVERTER, 0);
+  tex_node_type_base(&ntype, TEX_NODE_RGBTOBW, "RGB to BW", NODE_CLASS_CONVERTER);
   node_type_socket_templates(&ntype, rgbtobw_in, rgbtobw_out);
   node_type_exec(&ntype, NULL, NULL, rgbtobw_exec);
 
diff --git a/source/blender/nodes/texture/nodes/node_texture_viewer.c b/source/blender/nodes/texture/nodes/node_texture_viewer.c
index 1c22561bec4..e40cdb66cb1 100644
--- a/source/blender/nodes/texture/nodes/node_texture_viewer.c
+++ b/source/blender/nodes/texture/nodes/node_texture_viewer.c
@@ -55,11 +55,12 @@ void register_node_type_tex_viewer(void)
 {
   static bNodeType ntype;
 
-  tex_node_type_base(&ntype, TEX_NODE_VIEWER, "Viewer", NODE_CLASS_OUTPUT, NODE_PREVIEW);
+  tex_node_type_base(&ntype, TEX_NODE_VIEWER, "Viewer", NODE_CLASS_OUTPUT);
   node_type_socket_templates(&ntype, inputs, outputs);
   node_type_exec(&ntype, NULL, NULL, exec);
 
   ntype.no_muting = true;
+  ntype.flag |= NODE_PREVIEW;
 
   nodeRegisterType(&ntype);
 }